Pump-rod clamp.



' g No. 815,178.

j UNITED. STATES PAT NT ornron- Specification of Letters Patent.Application filed October 31,1905. Serial No. 285,367.,

Patented March 13, 1906.

- Tau/ll whom it may concern} Be it known that 1, ANDREW KNOOKER,acitizen of the United States, and a resident of Humboldt, Allen county,Kansas, have.

invented certain new and useful Improvements in Pump Rod Clamps, ofwhichthe following is a specification containing a full, clear, and exactdescription, reference being had to the accompanylng-drawings, forming apart hereof. I 1

My invention relates to pump-rod clamps; and the object of my inventionis to provide a simple, inexpensive, and easily-operated clamp to beapplied to pump-rods for clamping the same and maintaining them elevatedand in the position they assumeat the upper 1 end of the stroke.

In oil and other deep wells it is sometimes necessary to lock thepump-rod in elevated position or in the position it assumes when at theupper end of its stroke, and as the pumprod is of some length it is,quite heavy and requires considerable power to maintain it in elevatedposition, and I propose to provide a simple clamp to be engaged on thepump-rod and to rest on top of thepump-cylinder for holding the'pump-rodelevated. v To the above purposes my invention consists in certain novelfeatures of construction and arrangement of parts, which will behereinafter more clearly set forth, pointed out in my claims, andillustrated in the accompanying drawings, in which, Figure 1 is a sideelevation of the upper end of a pump-cylinder, showing the pump-rodprojecting upwardly therefrom, and my im proved clamp engaged upon saidrod. Fig. 2 is a plan view of the clamp applied to a pump-rod. Fig. 3 isa vertical section taken on the line 3 3 of Fig. 2 and showing the clamploosely mounted upon the pump-rod.

Referring by numerals to the accompanying drawings, 1 indicates theupper end of a pump-cylinder, 2 the usual gland or stuflingbox thereon,and 3 the pump-rod.

My improved clamp comprises a'block 4:, in

one side of which is formed a vertically-arranged semicircular recess 5,in which the pum -rod is engaged when the clampis applie' thereto.

6 indicates a U-shaped yoke, the parallel arms 7 of which passhorizontally through suitably-formed apertures in the ends of the block4. i a

8 indicates a block, through the ends of which are formed suitableapertures, through ends of said arms arescrew-threaded and re- 7 ceivenuts 9.

10 indicates a clamping-plate that is arranged between the pump-rod 3and the block. 4:, and in the ends of said plate are formed suitable:apertures through which the arms 7 pass.

Located upon the arms 7 and interposed between the plate- 10 and block 4are expansive coilsprings 1 1.

12 indicates a set -'screw that passes through the screw,threadedaperture 13, formed in the center of the block 8, and the point of saidscrew .bears againstthe side of the plate 10 opposite from the side orface that engages the pump-rod 3. The outer end of the set-screw 12 isprovided with a square head 14, that is adapted to be engaged by-thesocket of a suitable wrench, as shown by dotted lines in Fig. 1.

My improved clamp is assembled on top of the pump-cylinder around thepump-rod 3, and as long as the set-screw 12 is inan unset or withdrawnposition in the block 8 the pump-rod is free to move vertically throughI ment, the operator locates a suitable wrench on the squared end 14 ofthe set-screw and so mani ulates the set-screw as that it is movedthrough the block 8, and, as a result, the clamping-plate 10 will bebrought against the surface of the pum -rod 3', and said rod will bevery tightly c amped between said plate and block 4. This, very rigidlyengages the clamp upon the pump-rod, and as said clamp rests upon thetop of the pum cylinder the rod will be rigidly held at fie upper end ofits stroke. 1

When the clamp is loosened from the pump rod, the expansive coil springs1 1 move the clamping-plate 10 away from the pump-rod 3 and at the sametime move the block 4 away from said rod, so that the parts 7 of theclamp will not stick to the pump-rod.

My improved clamp is applicable for use on all classes of pumps, iseasily applied, quickly engaged, and being composed of a minimum numberof parts will not readily get out of order.

I claim 1. A pump-rod clamp of the class described,

IIO

the yoke, and a set-screw passing through said last-mentioned block;substantially as specified.

2. A pump-rod clamp, constructed With .t block, a yoke carried thereby,a block mounted upon the arms of the yoke, a set-screw passing throughsaid last-mentioned block, and a clamping-plate engaged by said setserewfor clamping upon the pump-rod; substantially as specified.

3. A pump-rod clamp, constructed with a block adapted to engage on thepump-rod, a yoke carried by said block, a second block mounted upon thearms of the yoke, a setscrew passing through said last-mentioned block,a clamping-plate arranged upon the arms of the yoke and engaged by thepoint of the set-screw, and expansive coil-springs arranged between theends of the first-mentioned block and the clamping-plate; substantiallyas specified.

4. The combination With a pump-rod, of a block constructed to engage onsaid rod, a

yoke carried by said block, a second block 1 upon the yoke between thepump-rod and the l second-mentioned block against which plate the pointof the set-screw bears, and ex )ansive coil-springs located uponthearins oi the yoke between the clan1ping-plate and the first-mentionedblock; substantially as specified.

In testimony whereof I have signed my name to this specification inpresence of two subscribing Witnesses.

ANDREW KNOCKER.

Witnesses 0. WV. HALL, CHAS. SoI-IAFFNER.

